129072398492 has 12 divisors (see below), whose sum is σ = 227392649400. Its totient is φ = 64103070096.

The previous prime is 129072398461. The next prime is 129072398509. The reversal of 129072398492 is 294893270921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108281618 + ... + 108282809.

It is an arithmetic number, because the mean of its divisors is an integer number (18949387450).

Almost surely, 2^129072398492 is an apocalyptic number.

It is an amenable number.

129072398492 is a deficient number, since it is larger than the sum of its proper divisors (98320250908).

129072398492 is a wasteful number, since it uses less digits than its factorization.

129072398492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216564580 (or 216564578 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 56.

The spelling of 129072398492 in words is "one hundred twenty-nine billion, seventy-two million, three hundred ninety-eight thousand, four hundred ninety-two".